[Geotiff] Combining world files, tab files and tiffs

[Craig Stanton]

Ah, I see you actually list the projection in your examples below. Missed that the first time but I understand it now. The maps do appear to have been tagged with the projection stuff, now I just need to get find out if they are missing the pixel size/scale information, or if my app is ignoring it.

Thanks,
	Craig


On 27/08/2010, at 10:44 PM, Hermann Peifer wrote:

> On 27/08/2010 01:24, Craig Stanton wrote:
>> Hi All,
>> I'm trying to make geotiffs out of the tiffs available from the British Ordanance Survey...
>> I've now got GDAL and don't know what to do with it.
> 
> You could use the gdal tools like this:
> 
> $ ls -1  MiniScale_\(with_grid\)_R12.*
> MiniScale_(with_grid)_R12.tfw
> MiniScale_(with_grid)_R12.tif
> 
> 
> $ gdalinfo "MiniScale_(with_grid)_R12.tif"
> Warning 1: TIFFFetchNormalTag:Incompatible type for "RichTIFFIPTC"; tag 
> ignored
> Driver: GTiff/GeoTIFF
> Files: MiniScale_(with_grid)_R12.tif
>        MiniScale_(with_grid)_R12.tfw
> Size is 7000, 13000
> Coordinate System is `'
> Origin = (0.000000000000000,1300000.000000000000000)
> Pixel Size = (100.000000000000000,-100.000000000000000)
> Metadata:
>   TIFFTAG_SOFTWARE=Adobe Photoshop CS4 Macintosh
>   TIFFTAG_DATETIME=2009:12:04 12:52:21
>   TIFFTAG_XRESOLUTION=254
>   TIFFTAG_YRESOLUTION=254
>   TIFFTAG_RESOLUTIONUNIT=2 (pixels/inch)
> Image Structure Metadata:
>   COMPRESSION=LZW
>   INTERLEAVE=PIXEL
> Corner Coordinates:
> Upper Left  (       0.000, 1300000.000)
> Lower Left  (   0.0000000,   0.0000000)
> Upper Right (  700000.000, 1300000.000)
> Lower Right (  700000.000,       0.000)
> Center      (  350000.000,  650000.000)
> Band 1 Block=7000x12 Type=Byte, ColorInterp=Red
> Band 2 Block=7000x12 Type=Byte, ColorInterp=Green
> Band 3 Block=7000x12 Type=Byte, ColorInterp=Blue
> 
> 
> $ gdal_translate "MiniScale_(with_grid)_R12.tif" out.tif -a_srs 
> epsg:27700 -co compress=lzw
> Warning 1: TIFFFetchNormalTag:Incompatible type for "RichTIFFIPTC"; tag 
> ignored
> Input file size is 7000, 13000
> 0...10...20...30...40...50...60...70...80...90...100 - done.
> 
> 
> $ gdalinfo out.tif
> Driver: GTiff/GeoTIFF
> Files: out.tif
> Size is 7000, 13000
> Coordinate System is:
> PROJCS["OSGB 1936 / British National Grid",
>     GEOGCS["OSGB 1936",
>         DATUM["OSGB_1936",
>             SPHEROID["Airy 1830",6377563.396,299.3249646000044,
>                 AUTHORITY["EPSG","7001"]],
>             AUTHORITY["EPSG","6277"]],
>         PRIMEM["Greenwich",0],
>         UNIT["degree",0.0174532925199433],
>         AUTHORITY["EPSG","4277"]],
>     PROJECTION["Transverse_Mercator"],
>     PARAMETER["latitude_of_origin",49],
>     PARAMETER["central_meridian",-2],
>     PARAMETER["scale_factor",0.9996012717],
>     PARAMETER["false_easting",400000],
>     PARAMETER["false_northing",-100000],
>     UNIT["metre",1,
>         AUTHORITY["EPSG","9001"]],
>     AUTHORITY["EPSG","27700"]]
> Origin = (0.000000000000000,1300000.000000000000000)
> Pixel Size = (100.000000000000000,-100.000000000000000)
> Metadata:
>   TIFFTAG_SOFTWARE=Adobe Photoshop CS4 Macintosh
>   TIFFTAG_DATETIME=2009:12:04 12:52:21
>   TIFFTAG_XRESOLUTION=254
>   TIFFTAG_YRESOLUTION=254
>   TIFFTAG_RESOLUTIONUNIT=2 (pixels/inch)
>   AREA_OR_POINT=Area
> Image Structure Metadata:
>   COMPRESSION=LZW
>   INTERLEAVE=PIXEL
> Corner Coordinates:
> Upper Left  (       0.000, 1300000.000) (  9d29'46.99"W, 61d22'30.11"N)
> Lower Left  (   0.0000000,   0.0000000) (  7d33'23.21"W, 49d45'58.27"N)
> Upper Right (  700000.000, 1300000.000) (  3d38'5.08"E, 61d27'54.68"N)
> Lower Right (  700000.000,       0.000) (  2d10'18.73"E, 49d49'27.99"N)
> Center      (  350000.000,  650000.000) (  2d47'47.26"W, 55d44'26.94"N)
> Band 1 Block=7000x1 Type=Byte, ColorInterp=Red
> Band 2 Block=7000x1 Type=Byte, ColorInterp=Green
> Band 3 Block=7000x1 Type=Byte, ColorInterp=Blue
> 
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